(used of behavior or attitude) characteristic of those who treat others with condescension

(architecture) a masonry construction (usually curved) for spanning an opening and supporting the weight above it

a passageway under a curved masonry construction; "they built a triumphal arch to memorialize their victory"

a curved bony structure supporting or enclosing organs (especially the inner sides of the feet)

a curved shape in the vertical plane that spans an opening

3 letter answer(s) to mischievous

BAD

feeling or expressing regret or sorrow or a sense of loss over something done or undone; "felt regretful over his vanished youth"; "regretful over mistakes she had made"; "he felt bad about breaking the vase"

that which is below standard or expectations as of ethics or decency; "take the bad with the good"

5 letter answer(s) to mischievous

ELFIN

small and delicate; "she was an elfin creature--graceful and delicate"; "obsessed by things elfin and small"

suggestive of an elf in strangeness and otherworldliness; "thunderbolts quivered with elfin flares of heat lightning"; "the fey quality was there, the ability to see the moon at midday"- John Mason Brown